http://www.primate.wisc.edu/people/hamel/cp.html Ray Hamel's indispensable link list

http://zigalpha.net A collection of jigsaws and thematic puzzles

http://www.users.bigpond.com/bendr/xwd Regularly updated, this site is run by Kookaburra, another of this site's contributors.

http://www.nytimes.com/crosswords Crosswords from the New York Times. You need to pay a subscription to access most of them but there is a weekly freebie from the archives.

http://www.crosswordpuzzlegames.com Thousands of US-style crosswords along with the opportunity to create your own. A word puzzle helper also available.

http://www.btinternet.com/~ed.xword/index.html Some excellent crosswords, many with themes, and some interesting crossword articles.

http://www.chrisparadine.co.uk A collection of themed cryptic crosswords

http://www.UKPuzzle.com A collection of interactive puzzles by Anax, who appears on this site.

http://members.fortunecity.co.uk/mackem A growing collection of cryptic crosswords.

http://www.xwords.co.uk This site offers the opportunity to create your own puzzles online

http://www.pubcrosswords.com A regular series of puzzles with the opportunity to enter a prize competition.

http://www.crossbud.com/ An interesting discussion forum covering all aspects of crossword setting and solving.

http://poinscrosswords.com Crosswords by Poins, a contributor of two puzzles to to this site.

http://fifteensquared.net A daily blog giving a breakdown of Guardian and Independent puzzles. Very useful if you do these puzzles and get stuck!

http://thinks.com/index.htm and also  http://www.crossword-crazy.co.uk/index.html  Two splenidid sites containing many cryptics and all sorts of other puzzles from Michael Curl, who sets for the Guardian as Orlando and the FT as Cincinnus.